FAQ: Difference between revisions

FAQ (view source)

97 bytes added , 20:48, 4 September 2013

m

5,838

edits

@@ Line 318: / Line 318: @@
 == My heat index/humidex/wind chill is the same as my temperature  ==
+*Wind chill only applies when the wind speed is above 4.8 kph '''and''' (by default in Cumulus as it should really always be set, but this is an option that can be unset) the temperature is below 10 degrees Celsius.
+*Heat index only applies when the temperature is above 27 degrees Celsius '''and''' the humidity is above 40%.
+* Humidex does not have any 'cutoff' values, but at low temperature and/or humidity it will give the same figure as ambient temperature.
-Wind chill only applies when the wind speed is above 4.8 kph and the temperature is below 10C. (The temperature cutoff is an option in Cumulus, but should really always be set). Heat index only applies when the temperature is above 27C and the humidity is above 40%.
+If heat index or wind chill is not applicable, Cumulus will set them the same as the ambient temperature.
-The rest of the time they are the same as the ambient temperature.
-While Humidex does not have any 'cutoff' values, at low temperature and/or humidity it will give the same figure as ambient temperature.
 == My station invented some rain that didn't really occur, and I want to set it to zero (or some other figure)  ==